please answer these 3 question ASAP need it urgently just tell right options

QUESTION 1 Consider the figures depicting rectangular pulses on a string. Reference: Ref 17-1 If pulse 1 were reflected from a wall, which one of the patterns above would represent the reflected pulse? O A. 5 O B. 4 O C. 3 O D. 2 O E. 1 QUESTION 2 Consider the figures depicting rectangular pulses on a string. Reference: Ref 17-1 Complete the following statement: If pulse 2 were superimposed on pulse 3, O A. the resulting pattern would be represented by 5. O B. the resulting pattern would be different than 1, 4, and 5. O C. constructive interference would occur. O D. the resulting pattern would be represented by 1. O E. the resulting pattern would be represented by 4.QUESTION 3 Consider the figures depicting rectangular pulses on a string. Reference: Ref 17-1 Which pulses must be superimposed to give the situation shown in 5. O A. 2, 3, and 4. O B. 1 and 2 O C. 1, 2, and 4 O D. 2 and 4 O E. 1 and 3